import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // getToken from cookie

NProgress.configure({ showSpinner: false }) // NProgress Configuration

store.dispatch('Resize')

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach((to, from, next) => {
    NProgress.start() // start progress bar
    if (getToken()) { // determine if there has token
        /* has token*/
        if (to.path === '/login') {
            next({ path: '/' })
            NProgress.done()
        } else {
            if (store.getters.name.length === 0) { // 判断当前用户是否已拉取完user_info信息
                store.dispatch('GetUserInfo').then(res => { // 拉取user_info          
                    /** 
                     * note: roles must be a array! such as: 
                     * [
                     *  {
                     *    name:'pageview',
                     *    services:['/user/info','/user/list'],
                     *    children:[
                     *      {
                     *        name:'pageview',
                     *        services:['/user/info','/user/list'],
                     *      }
                     *    ]
                     *  }
                     * ]
                     * */
                    const roles = res.data.roles
                    const isAdmin = res.data.isAdmin
                    store.dispatch('GenerateRoutes', { isAdmin, roles }).then(() => { // 根据roles权限生成可访问的路由表
                        router.addRoutes(store.getters.addRouters) // 动态添加可访问路由表
                        next({...to, replace: true }) // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
                    })
                    next({...to, replace: true })
                }).catch(() => {
                    store.dispatch('FedLogOut').then(() => {
                        Message.error('Verification failed, please login again')
                        next({ path: '/login' })
                    })
                })
            } else {
                next()
            }
        }
    } else {
        /* has no token*/
        if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入
            next()
        } else {
            next('/login') // 否则全部重定向到登录页
            NProgress.done() // if current page is login will not trigger afterEach hook, so manually handle it
        }
    }
})

router.afterEach(() => {
    NProgress.done() // finish progress bar
})